Casing head



Patented Nov. 22, 1927.

UNITED STATES 1,650,131 PATENT OFFICE.

J' I. JOENSTONE, OF LYNWOOD, CALIFORNIA, ABSIGNOB OI ONE-HALF TO IRA I.

' CONK EY, OF HAYWOOD, CALIFORNIA.

l casmc- 1mm.

This invention relates to casing heads and more especially to a cone-pack head; that is, a head having a conical member receiving the tubing and seating on the head body.

5 An object is to provide utmost simplicity,

reduction in number of parts, ease of installation and dismounting, and high efliciency and great durability.

More particularly an object is to provide a packing device employing hydraulic packing material so arranged and sunk that there is no possibility of the packing medium being blown out, which is a. serious defect in many types of casing heads.

An object is to provide an instantaneously seating conical packing member. And to rovide for the direct connection of the tubmg to the packing cone and thereby eliminate ordinary tube coupling at the head.

Additional objects and advantages will be made manifest in the following specification of apparatus embodying the invention herewith illustrated; it being understood that modifications, variations and adaptations may be restorted to within thev spirit, scope and principle of the invention.

Figure 1 is an axial section of the head adapted for low pressure wells.

F lgure 2 is a perspective, partly in section,

of a high pressure adaptation.

The apparatus of Figure 1 comprises a generally tubular body 2 having vgas-outlet ttin holes 3, and having its bottomtapped at 4 or well casing C. The upper end of the body 2 has a low angle conical bore 5, smoothly machined or ground.

What is here termed the cone-pac comprises a very substantial or stocky plug or closure 10 externally conical to closely seat in the body bore 5.

The head cone or plug is provided with one or more spaced, peripheral grooves 11 whose sides are at right angles to the face of the bore and in these grooves are laced a square hydraulic packing me ium 12 which has but very small projection beyond the face of the cone or plu 10. The deep countersinking of the pac ing 12 wholly eliminates any possibility of the gas ressure in the casing tearing or blowing out the packing of the head. Theupper end of the packer cone 10 may be inwardly tapered so as to receive, when desired, set screws 13 in the body 2.

To the aim of reduction of parts, the conepack device 10 is chambered from top to bottom and its up r and lower ends have tubing threads 16 or near ends of pump tubing T-T. This eliminates a coupling in the tubing and obviates any packing bearing upon the tubing and makes it necessary to pack only between the body 2 and cone 10.

In the smaller pump lines and low pressure wells the weight of the tubing will be sufy 2. The flange has a conical face 19 complementary to the top shoulder of the coneack and thereby jambs the cone and its packing 12 down solidly in the conical seat or bore 5. The nipple 10' is internally :tmld externally threaded for fittings and u in It 5111 be seen that there are but two parts, in this complete casing head, to be handled in installing and dismounting, and but one 'joint zone to be packed ofi.

The cone-pack casing head eliminates all worry about packing, tubing ring or spider body. The tubing screws into'the special cone coupling from above and below, this coupling taking the place of the tubing ring. and when set 1t"securely packs 011' between the tubing and the casing. The cone taper in the head bod is correctly designed for the slips to use w en tubing or pullin the well. In usin the cone-pack casing ead there is no trou le, inconvenience or delay in putting the well on. When the tubing is landed it instantly becomes securely packed. The packing is never disturbed inthe cone and it is always ready to function. After lifting the cone to clear the head body, sli s can be used to continue the pulling. when set, are about flush with the top of the head, making its operation quick and convenient.

he slips,

The cone-pack casing head comparesfavorably in cost with any casing head now I The method of inserting the packing makes it virtually everlasting. There 1s no chance of the packing being pulled out of its seat, either by the action of the gas or through contact with another object. When 1. seating the tubing, the travel of the packing along the taper in the head body is so slight v that a well can be pulled and tubed hundreds of times without noticeable wear on the packing.

The invention claimed is":

In a casing head device, a tube supporting plug havlng an elongated, conical outer seating face which is provided with spaced peripheral grooves of rectangular cross-section whose side walls are perpendicular to the conical face and which grooves are adapted to snugly receive given size square packing.

JOHN I. JOHNSTONE. 

